Furnace grate



Ill

Patented i2, 192% warren srArEs PTENT OFFICE.

LESTER WILLIAMS, OF MARSHALLTOWN, IOWA, ASSIGNOR TO MARSHALLTOWN HEATERCOMPANY, OF MABSI-IALLTOWN, IOWA, A CORPORATION OF IOXVA.

FURNACE GRATE.

Application filed December 20, 1927. Serial No. 241,337.

The object of my invention is to provide a furnace grate of simple,durable and inexpensive construction, having a number of parallel gratebars which may be easily and quickly placed in position or removed, andwhen placed in position have means whereby all of the grate bars will beactuated in unison by a single operating means.

More specifically it is the object of my invention to provide a gratecomprisingan annular frame formed of cast, material and a series ofgrate bars, and means for operatively connecting all of said grate bars,the grate bars and the connecting means being formed of cast or wroughtmaterialto eliminate the use of bolts and'nuts which soon become rustedand diflicult to remove for replacement.

A further object is to provide in a grate comprising an annularsupporting frame and pivotally mounted grate bars, improved meansformounting the grate bars therein.

My invention consists in the construction, arrangement and combinationof thevarious parts of the device, whereby the objects contemplated areattained, as hereinafter more fully set forth, pointed out in my claims,and illustrated in the accompanying drawings, in which: 7 I Figure 1 isa horizontal sectional view of a furnace showing my improved gratemounted therein. H

Figure 2 is a detail sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a detail sectional on the line 33 of Figure 1.

Figure 1 is a detail sectional on the line 1 1 of Figure 1.

Figure Sis a detail sectionalview on the line ofFigure 1.

Figure 6 a detail sectional on the line (3 6 of l ig'ure 1.

Figure 7 is a detail sectional on the line 7- of Figure 1.

Figure 8 is an inverted perspective view of the locking device for oneof the grate bars. a

The numeral 10 indicates the base of a furnaceand 11 the uprightwalls,.which are supported on said base. The base 10 is provided withinwardly projecting flanges 12 on which are supported an annular framemember 13. The said frame member coinprises semi-circular sections 1 1and 15 seview taken view taken taken view taken view taken curedtogether by means of bolts. The

inner edge of the frame member 13 is preferably provided with anupwardly extending flange 17. The member 15 is supported in the backpart of the furnace, while the member 14 issupported in the front partof the furnace, said members being secured to the flanges .12 by meansof bolts 18.

One side of the base 10 is provided with an opening 19, which isprovided with a door casing having a door opening 21, and a downwardlyextending flange 22 at its upper edge. The said flange 22 is providedwith a notch 23 for receivingthe operating rod of the grate hereinafterdescribed. I

Support-ed within the frame member 13, I have provided preferably threegrate bars 24,; 25 and 26. The grate bar 26 has at its rear end a pivotmember 27 terminating in a head 28, while its forward end is providedwith a pivot member 29 designed to be supported in adownwardly extendingstirrup 3O. The member 27 is pivotally mounted in a recess 31 formed inwhat I shall term a socket lug 32 formed on the inner edge of the member15. Said lug 82 is provided witha slot 33 for receiving. the head 28,said slot being open at its bottom to permit any ashes that might gatherin the slot to pass downwardly through the grate into the ash pit below.

By this arrangement it will be seen that the grate bar 26 may be easilyand quickly placed into position by first placing the member 29 withinthe stirrup 30,- after first supporting the grate bar in an inclinedposition with its rear endinelined upwardly, then moving the barforwardly causing the member 29 to enter the stirrup 30. The rear endmay then be lowered, permitting the head 28 to enter the slot and themember 2? to rest in. the recess 31.

The grate bar 25 located at the side of the frame 15 opposite from thegrate bar 26, and has its rear end mounted in a manner similar to thegrate bar 26, while its forward end is provided with a long'operatingrod and secured in said position by means of a detachable plate37,,whieh may be secured in position by means offtwo small bolts 88.Thebar 25 is removed by removing the plate 37, then permitting theforward end of the red 36 to be lowered, after which the rear end ofthebar 25 may beelevated to cause the member 28 to disengage the slot33. v The rear end of each of the bars 25 and is provided with a pair ofdownwardly ex tending arms 34 slightly spaced apart and having theirlower ends connected by means of a longitudinal pin 35.

The grate bar 24 is mounted between the bars 25 and 26 and has itsfrontend provided with a pivot pin 39 mounted in a downwardly extendingstirrup 40, while the rear end of the bar 2% is provided with a pivotpin ll rotatively supported in a stirrup The front end oi the grate baris designed to rest against the stirrup 40, while the rear end of thegrate bar is slightly spaced from the stirrup -12. A key, is provided tobe supported between the rear end of the grate bar and the stirrup ll toprevent rearward movement of the said bar. The key d3 comprises a headmember elihaving a pair of parallel prongs to form a slot 46 forreceiving the pivot member The head 4% is designed to rest on theshoulder 45 extending inwardly from the flange 17. The pivot member 39of such length that when the key 43 has been removed and the grate bar24- is moved rearwardly the pivot pin 39 may be elevated from thestirrup 40, permittingthe grate bar to assume an inclined position,after which the bar may be moved forwardly and the pin 4-1 withdrawnfrom the stirrup 42. I

The rear end of the under surface of the bar 24 is provided with adownwardly tending arm l? in transverse alinement with the rear ones ofthe arms 34. The lower end of the arm a7, is provided with a laterallyextending pin 48. Supported between the arms 34 is an operating link 49having each end of its lower edge provided with a notch 50 for receivingthe pins 35, while the central portion of the link i!) is provided withan opening 51 for receiving the pin 48. The pin 48 prevents upwardmovement of ti e lien- -19, and thereby retains the pins within thenotches 50. The pin 48 may be detached trom'the link 49 by removing thekey 43 and imparting rearward movement to the bar 24, which will causethe arm 47 to be moved rearwardly and the pin 48 to disengage theopening 51, after which the link .9 may be elevated to cause the pin 85to disengage the notches 50. The said link may then be moved endways andremoved from the arm ill.

By this arrangement it will be seen that l have provided a gratecomprising an annular frame and series of grate bars which are pivotaliymounted and provided with means for operatively connecting all ofsaid'bars, so that the said. bars may be operated in unison; lhe partsare so arranged that the grate bars, with the'r downwardly projectingarms and pivot pins, may be cast integral, the operating link also beingformed of cast material, as well as the annular frame member, the socketlugs and stirrups being cast integral with said f'ame members, therebyproviding a grate in which the bars may be easily and quickly attachedor removed without the use of threaded bolts or screws, any other thanthe screws 38 for supporting the plate 37, said screws being supportedin the front end of the furnace where they may be easily operated upon.

By providing the open slots 33 in the lugs 32, any possibility of thesockets becoming clogged with ashes or the like will be entirelyeliminated, as the ashes are worked downwardly through the slots eachtime the grate bars are rotated. The stirrup: 4:0 and 4-2 are supportedsubstantially beneath the frame members 13 and have their ends open topermit ashes and the like to workfreely from said 'stirrups.

I claim as my invention:

1. A grate comprising an annular frame, a series of substantiallyparallel grate bars pivotally mounted in said frame, one of said gratebars having a downwardly projecting arm provided with a laterallyprojecting pin, the other bars each having a pair of downwardlyprojecting and slightly spaced arms, the lower ends of said arms beingconnected with a longitudinal pin, each of said bars with its respectivearms and pins being formed integral, an operating link having one edgenear each end provided with a notch and its central portion with anopening, said link being designed to have its ends supported between thespaced arms of the second grate bars with the laterally projecting pinof the downwardly projecting arm of the first grate bar supported in itscentral opening, and means for imparting a rocking movement to one ofsaid grate bars.

2. A grate comprising an annular frame, a series of substantiallyparallel grate bars pivotally mounted in said frame, one of said gratebars having a downwardly projecting arm provided with a laterallyprojec'ting pin, the otherbarseach having a pair of downwardlyprojecting and slightly spaced arms. the lowerends of said arms beingconneiirtcd with a loi'igiludinal pin, eat-hot said bars with itsrespective arms and pins being formed integral, an operating link havingone edge near each end provided with a notch and its central portionwith an opening, said link being designed to have its end supportedbetween the spaced arms-of the second grate bars with the laterallyprojecting pin ot' the downwardly projecting .1 of the first grate barsupported' in its central opening, the first grate bar being slidablymounted to move he laterally projecting pin L into and out of theopening of said link, a detachable key for Ill) locking said grate baragainst sliding movement with the laterally pro ecting pin with in theopening of said link, and means for imparting a rocking movement to oneof said grate bars.

A grate comprising an annular frame adapted to support a series ofsubstantially parallel grate bars having their ends provided with pivotsterminating in head members, the inner edge of said annular frame havingsocket lugs for supportingthe pivot members of said grate bars, saidlugs being provided with slots for receiving the heads of saidPlVOlBlIlOllllJGl'S.

l. A grate comprising an annular frame, a series of grate barspivot-ally and detachably mounted therein, one of said grate bars beingcapable of movement endways, the last said grate bar being provided witha downwardly extending arm and a laterally extending pin, the other onesof said grate bars each being provided with a pair of downwardlyextending arms slightly spaced apart and having their lower endsconnected with pivot pins, a link having its lower edge pro-- vided neareach end with a notch for receiving the connecting pins of thedownwardly extending arms of said bars, the central portion of said linkbeing provided with an opening for receiving the laterally extending pinof the first said grate bar. 7

5. A grate comprising an annular frame, a series of grate bars pivotallyand detachably mounted therein, one of said grate bars being capable ofmovement endways, the last said grate bar being provided with adownwardly extending arm and a laterally ext-ending pin, the other onesof said grate bars each being provided with a pair of downwardlyextending arms slightly spaced apart and having their lower endsconnected with pivot pins, a link having its lower edge provided neareach end with a notch for receiving the connecting pins of thedownwardly extending arms of said bars, the central portion of said linkbeing provided with 7 an opening for receiving the laterally extendingpin of the first said grate bar, and means for locking the last saidgrate bar against movement endways when the laterally extending pin iswithin the central opening of said link.

Des Moines, Iowa, May 18, 1927.

LESTER WILLIAMS.

